crosby



@met chimie.

c. o. CROSBY, or NEW HAVEN, CONNECTICUT.

Letters Patent N0`.91,720, dated June 22, 1869.

Hannover/:ENT 1N LAsTs.

The Schedule referred to in these Letters Patent and maliing part of the same.

To all whom it may concern:

Be it known that I, G. O. CROSBY, ofNew Haven, in the county of New Haven, and State of Connecticut, have invented a new .Improvement in Lasts; and I do hereby declare the following, when taken in'connectiou with the accompanying drawings and the letters of reference marked thereon, to be a full, clear,

and exact description of' the same, and which said drawings constitutepart of this specification, and represent, iu l Figure 1, a side View;

Figure 2, a bottom view;

Figure 3, a section on line :c :t

Figure 4, a section on line y y Figure 5, a section on line z z; and in Figure 6, a sectional view of an ordinary last, on line y y. Y

l'lhis invention relates to au improvement in lasts for the manufacture of boots and shoes, so as to adapt the last to the sewing of the welt or sole,.or both, byV mechanical means; and with special reference to the machine for which Letters Patent were ginuted to me, bearing date May 25,1869, andto the use of the sole patented to me February 26, 1867.

Lasts of common construction have been formed so that the upper or body of the shoe projects beyond the edge of the sole, but more particularly does this occur in that part of the shoe termed the shank, where the shape is nearly as seen in fig. 6; and so far does the body of the shoe project beyond thesole that it is diiicult to bring the needle of a sewing-machine to the proper position forpiercing the welt and sole; and further, the shape of the lastis such (presenting no edge) that the sole itself must necessarily be used as a guide.

The object of my invention is to adapt the last to the sewing of the sole or welt, or both, with a Y straight needle, and to form a guide 'by the edge of the last; and the invention consists in shaping the last from the bottom up, so thatthe sides willv be parallel vo`r converging towards the top of the last,forming nearly a right angle, or less, at the sole of thelafst.

To enable others skilled in the art to make and use my invention, I will proceed to describe the same as illustrated in the accompanying drawings.

A is the last, .the shape of the bottom being nearly, or exactly, that of common lasts.

From the bottom up the last is narrower than at the bottom, as seen in figs. 3, 4, and 5, fig. 4 being at the shank, where the two sides are made parallel, or nearly so, and forming a right angle,or nearly so, at the edge. Thus a straight needle, as denoted at a, Iiig. 4, can pass through nearly at the edge of the last.

This form of last necessitates a proportionately greater depth, in order that the last may measure the same at different points, and fill the shoe or hoot, that is to say, so much as is reduced in width and length must be made up in depth. l

From this description, it will be seen that the edge at the bottom or sole of the last forms a distinctly deiinedline, so that the presser-foot or guide may opel'- vate directly thereon, to govern the path of the needle.

Having fully described my invention,

What I claim as new and useful, and desire to secure by Letters Patent, is

In a last for the making of boots and shoes, forming the edge or bottom of the sole ofequal width, or

broader than that portion directly above, substantially as shown and described.

' C. O. CROSBY.

Witnesses:

J. H. SHUMWAY,

A. J. TIBBITS. 

